Obviously you haven't been around Subarus much. .

What exactly are you selling? Ab? Cbe? Tbe?
What flange style? Flat? Donut?
Are gaskets included?
Is all necessary hardware included?
Has it been modified in any way?
Any damage?

In these days of eBaymissions (i.e. omissions on eBay by just NOT saying what's been altered/just plain wrong with something) you can't provide too much information.

So in light of the fact that you provided only one small pittance of information compared to the sea that you should have, one might think you were the one deserving to be put down not Fupa.

The guy's question is legit and I'm pretty sure you just lost at least one potential sale if not more by your condescension and rudeness. Not to mention people remember that stuff when you're selling future items as well.